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Not if that is a surge tank. Is this a surge tank, or a real reciever with a surge bypass?

If you're not flashing, what is the problem?
Low liquid level isn't going to cause case ice-ups. Is your head pressure OK? Is the defrost differential valve set and working properly? Is the defrost time NORMALLY sufficient to clear the coils, or has this been an ongoing problem? Is the terminating temp too low?

If you're not flashing at your furhtest valve, (and you are NOT if the coils are icing up...) the least of your problems is an empty reciever.

as far as i know it's a real receiver, and i've had coils ice up before at different stores due to low refrigerant level. I'm just kinda trying to get the store ru nnin g properly before i lose my job! doesn't say it's an envirogaurd unit, so i'm gonna assume that it's a normal system. i don't know the history of the store, so i'm stuck there as well.